Google Authenticator - Google Authenticator is a multifactor app for mobile devices.
Apple - Available on iOS
andOTP - andOTP is a two-factor authentication App for Android 4.4+
iPad 9.7" - The new $329 entry-level iPad for students
Microsoft Authenticator - One app to quickly and securely verify your identity online, for all of your accounts.
Microsoft Surface - Life is a passion project.